// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2015-2016, International Business Machines
* Corporation and others. All Rights Reserved.
*******************************************************************************
* resource.h
*
* created on: 2015nov04
* created by: Markus W. Scherer
*/
#ifndef __URESOURCE_H__
#define __URESOURCE_H__
/**
* \file
* \brief ICU resource bundle key and value types.
*/
// Note: Ported from ICU4J class UResource and its nested classes,
// but the C++ classes are separate, not nested.
// We use the Resource prefix for C++ classes, as usual.
// The UResource prefix would be used for C types.
#include "unicode/utypes.h"
#include "unicode/unistr.h"
#include "unicode/ures.h"
#include "restrace.h"
struct ResourceData;
U_NAMESPACE_BEGIN
class ResourceValue;
// Note: In C++, we use const char * pointers for keys,
// rather than an abstraction like Java UResource.Key.
/**
* Interface for iterating over a resource bundle array resource.
*/
class U_COMMON_API ResourceArray {
public:
/** Constructs an empty array object. */
ResourceArray() : items16(nullptr), items32(nullptr), length(0) {}
/** Only for implementation use. @internal */
ResourceArray(const uint16_t *i16, const uint32_t *i32, int32_t len,
const ResourceTracer& traceInfo) :
items16(i16), items32(i32), length(len),
fTraceInfo(traceInfo) {}
/**
* @return The number of items in the array resource.
*/
int32_t getSize() const { return length; }
/**
* @param i Array item index.
* @param value Output-only, receives the value of the i'th item.
* @return true if i is non-negative and less than getSize().
*/
UBool getValue(int32_t i, ResourceValue &value) const;
/** Only for implementation use. @internal */
uint32_t internalGetResource(const ResourceData *pResData, int32_t i) const;
private:
const uint16_t *items16;
const uint32_t *items32;
int32_t length;
ResourceTracer fTraceInfo;
};
/**
* Interface for iterating over a resource bundle table resource.
*/
class U_COMMON_API ResourceTable {
public:
/** Constructs an empty table object. */
ResourceTable() : keys16(nullptr), keys32(nullptr), items16(nullptr), items32(nullptr), length(0) {}
/** Only for implementation use. @internal */
ResourceTable(const uint16_t *k16, const int32_t *k32,
const uint16_t *i16, const uint32_t *i32, int32_t len,
const ResourceTracer& traceInfo) :
keys16(k16), keys32(k32), items16(i16), items32(i32), length(len),
fTraceInfo(traceInfo) {}
/**
* @return The number of items in the array resource.
*/
int32_t getSize() const { return length; }
/**
* @param i Table item index.
* @param key Output-only, receives the key of the i'th item.
* @param value Output-only, receives the value of the i'th item.
* @return true if i is non-negative and less than getSize().
*/
UBool getKeyAndValue(int32_t i, const char *&key, ResourceValue &value) const;
/**
* @param key Key string to find in the table.
* @param value Output-only, receives the value of the item with that key.
* @return true if the table contains the key.
*/
UBool findValue(const char *key, ResourceValue &value) const;
private:
const uint16_t *keys16;
const int32_t *keys32;
const uint16_t *items16;
const uint32_t *items32;
int32_t length;
ResourceTracer fTraceInfo;
};
/**
* Represents a resource bundle item's value.
* Avoids object creations as much as possible.
* Mutable, not thread-safe.
*/
class U_COMMON_API ResourceValue : public UObject {
public:
virtual ~ResourceValue();
/**
* @return ICU resource type, for example, URES_STRING
*/
virtual UResType getType() const = 0;
/**
* Sets U_RESOURCE_TYPE_MISMATCH if this is not a string resource.
*
* @see ures_getString()
*/
virtual const char16_t *getString(int32_t &length, UErrorCode &errorCode) const = 0;
inline UnicodeString getUnicodeString(UErrorCode &errorCode) const {
int32_t len = 0;
const char16_t *r = getString(len, errorCode);
return UnicodeString(true, r, len);
}
/**
* Sets U_RESOURCE_TYPE_MISMATCH if this is not an alias resource.
*/
virtual const char16_t *getAliasString(int32_t &length, UErrorCode &errorCode) const = 0;
inline UnicodeString getAliasUnicodeString(UErrorCode &errorCode) const {
int32_t len = 0;
const char16_t *r = getAliasString(len, errorCode);
return UnicodeString(true, r, len);
}
/**
* Sets U_RESOURCE_TYPE_MISMATCH if this is not an integer resource.
*
* @see ures_getInt()
*/
virtual int32_t getInt(UErrorCode &errorCode) const = 0;
/**
* Sets U_RESOURCE_TYPE_MISMATCH if this is not an integer resource.
*
* @see ures_getUInt()
*/
virtual uint32_t getUInt(UErrorCode &errorCode) const = 0;
/**
* Sets U_RESOURCE_TYPE_MISMATCH if this is not an intvector resource.
*
* @see ures_getIntVector()
*/
virtual const int32_t *getIntVector(int32_t &length, UErrorCode &errorCode) const = 0;
/**
* Sets U_RESOURCE_TYPE_MISMATCH if this is not a binary-blob resource.
*
* @see ures_getBinary()
*/
virtual const uint8_t *getBinary(int32_t &length, UErrorCode &errorCode) const = 0;
/**
* Sets U_RESOURCE_TYPE_MISMATCH if this is not an array resource
*/
virtual ResourceArray getArray(UErrorCode &errorCode) const = 0;
/**
* Sets U_RESOURCE_TYPE_MISMATCH if this is not a table resource
*/
virtual ResourceTable getTable(UErrorCode &errorCode) const = 0;
/**
* Is this a no-fallback/no-inheritance marker string?
* Such a marker is used for
* CLDR no-fallback data values of (three empty-set symbols)=={2205, 2205, 2205}
* when enumerating tables with fallback from the specific resource bundle to root.
*
* @return true if this is a no-inheritance marker string
*/
virtual UBool isNoInheritanceMarker() const = 0;
/**
* Sets the dest strings from the string values in this array resource.
*
* @return the number of strings in this array resource.
* If greater than capacity, then an overflow error is set.
*
* Sets U_RESOURCE_TYPE_MISMATCH if this is not an array resource
* or if any of the array items is not a string
*/
virtual int32_t getStringArray(UnicodeString *dest, int32_t capacity,
UErrorCode &errorCode) const = 0;
/**
* Same as
*
* if (getType() == URES_STRING) {
* return new String[] { getString(); }
* } else {
* return getStringArray();
* }
*
*
* Sets U_RESOURCE_TYPE_MISMATCH if this is
* neither a string resource nor an array resource containing strings
* @see getString()
* @see getStringArray()
*/
virtual int32_t getStringArrayOrStringAsArray(UnicodeString *dest, int32_t capacity,
UErrorCode &errorCode) const = 0;
/**
* Same as
*
* if (getType() == URES_STRING) {
* return getString();
* } else {
* return getStringArray()[0];
* }
*
*
* Sets U_RESOURCE_TYPE_MISMATCH if this is
* neither a string resource nor an array resource containing strings
* @see getString()
* @see getStringArray()
*/
virtual UnicodeString getStringOrFirstOfArray(UErrorCode &errorCode) const = 0;
protected:
ResourceValue() {}
private:
ResourceValue(const ResourceValue &); // no copy constructor
ResourceValue &operator=(const ResourceValue &); // no assignment operator
};
/**
* Sink for ICU resource bundle contents.
*/
class U_COMMON_API ResourceSink : public UObject {
public:
ResourceSink() {}
virtual ~ResourceSink();
/**
* Called once for each bundle (child-parent-...-root).
* The value is normally an array or table resource,
* and implementations of this method normally iterate over the
* tree of resource items stored there.
*
* @param key The key string of the enumeration-start resource.
* Empty if the enumeration starts at the top level of the bundle.
* @param value Call getArray() or getTable() as appropriate. Then reuse for
* output values from Array and Table getters. Note: ResourceTable and
* ResourceArray instances must outlive the ResourceValue instance for
* ResourceTracer to be happy.
* @param noFallback true if the bundle has no parent;
* that is, its top-level table has the nofallback attribute,
* or it is the root bundle of a locale tree.
*/
virtual void put(const char *key, ResourceValue &value, UBool noFallback,
UErrorCode &errorCode) = 0;
private:
ResourceSink(const ResourceSink &) = delete; // no copy constructor
ResourceSink &operator=(const ResourceSink &) = delete; // no assignment operator
};
U_NAMESPACE_END
#endif